Oscillating propeller.



PATENTED DEG-. 22, 1903.

V W. B. TERRY. OSGILLATING PROPELLER.

APPLICATION FILED JAN. 31,1903.

10 MODEL.

MZZziamji IVs/ y [/VVENTOR W1 TNESSES:

Afiai'ney UNITED STATES Patented December 22, 1903 PATENT OFFICE.

WILLIAM B. TERRY, OF MARLOW, INDIAN TERRITORY.

OSCILLATING PROPELLER.

SPECIFICATION forming part of Letters Patent No. 747,506, dated December22, 1903.

* Application filed January 31, 1903. Serial No. 141,269. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM B. TERRY, a citizen of the United States,residing at Marlow, Chickasaw Nation, Indian Territory, have inventednew and useful Improvements in Oscillating Propellers, of which thefollowing is a specification.

This invention relates to propellers for boats and the like simulatingsomewhat an oar; and the purpose of the same is to obtain a regularandincreased forceful impact of the blades against water and a minimumof resistance on the return stroke, the propeller being completelysubmerged when in use and automatically opening to catch on the forwardstroke and adapted to be actuated either by manual or motive power.

The invention consists in the construction and arrangement of theseveral parts which will be more fully hereinafter described andclaimed.

In the drawings, Figure 1 is a side elevation of a boat, showing theimproved propeller applied thereto. Fig. 2 is a rear elevation of oneset of the propeller or oar blades, shown open. ing the blades closed,or in the position they occupy in relation to each other at thebeginning of the forward stroke. Fig. 4 is a horizontal section on theline 4 4 of Fig. 2. Fig. 5 is a horizontal section on the line 5 5 ofFig. 0

of the parts of the lock-hinge for the blades.

Similar numerals of reference are employed to indicate correspondingparts in the several views.

The improved propeller is adapted to be used. in connection withoar-locks, similar to the ordinary oars, and manually operated orapplied to the opposite sides of boats of any dimensions and actuated bysteam or electric motors and applicable to either large or smallvessels, and in view 'of the regularity and positiv'eness of the catchof the blades the full power of the engines or motors will becontinuously transmitted to the improved devices, and lost motion, orwhat is ordinarily termed run away, of the engines or motors will beobviated. There are numerous modesof arranging the propellers so as toobtain the best speed results with a minimum expenditure of operatingpower, and various Fig.3 is a rear elevation showa. Fig. 6 showsdetached perspective views well-known mechanisms for directly operatingthe propellers will be adopted to meet va-' rious contingencies andconstructions resident in boats to which it is desired to apply theimproved propeller. It is also proposed to arrange the propellers inseries on opposite sides of a boat to have'a push-and-pull action and onthe return stroke in both instances to reduce the resistance to aminimum, with obvious advantages in speed, as clearly indicated byFig. 1. The simplified use of the improved propeller, however, will beinthe form of a manually-operated construction of oar; but in all usesand applications the blades of the improved device will be heldcontinuously submerged.

The specific description of one of the propellers or oars will apply toall that are used, by reason of the fact that the construction Will beduplicated in each, and referring to the parts by numerals the numeral 1designates a loom, which in the present instance is in the form of acylindrical bar and will be supplied with a suitable handle or grip whenthe improved device is employed in the same manner as an ordinarymanually-operated oar, or it may be cranked or bent when applied toopposite sides of a motor-driven vessel. The dimensions of this loomwill depend upon the proportions of the remaining parts of the improveddevice and the resistance required commensurate with the operativepower. On the outer extremity of. the loom is a pair of blades 2,supplied with hinge members 3, engaging the loom, and with'anintermediate lockhinge for limiting the opening and closing movements ofthe blades. This lock-hinge comprises two members at and 5, as clearlyshown by Fig. 6, each member having a flattened shank 6 firmly securedto the one side of each blade, and both blades at the point oflocationof the said lock-hinge are formed with slots 7 to provide aclearance for the operation of the members 4 and 5. The innerextremityof the member 4 has a bearing-table 8 in a plane at right angles to theshank thereof, and from the rear side of said table astop-flange 9 isupstruck. The inner extremity of the member 5 is in the form of abearing-table 10, which closely contacts and,

moves on the table 8, and at its rear side edge said table 10 isconstructed with a stopshoulder 11, which engages with one edge of theupstanding stop-flange 9 and prevents the blades 2 from openingrearwardly beyond a predetermined extent. The front edge of the table 10adjacent to the shank of the member 5 has a recess 12, so as to give aclearance for the blades to close, the wall of the said recess 12contacting with a corresponding portion of the opposite member 4 at thepoint where the shank 6 thereof angularly continues into the table 8,and by this means the blades 2 are always held partially open, as

shown by Fig. 5, so that they will reliably catch on the forward strokeof the propeller and be forcedopen to their full extent as they areresistfully brought against the water, and thereby avoid failure tooperate, which might arise if the blades were permitted to come togetherin close contact. Below the table 8 and above the table 10 nuts 13 aremounted on the loom to prevent the members of the lock-hinge fromlongitudinally slipping, and by this means the blades are held in oneposition in relation to the loom and displacement thereof is obviated.When the blades are thrown open by forceful impact against the Water,the one edge of the upstanding flange 9 strikes the shoulder 11, and thetwo blades will then be in the position shown by Fig. 4, the said flangebeing of a length suflicient to resist fracture or breakage by thecontinuous sudden impact of the shoulder 11 thereagainst, and a portionof the edge of the table 10 is in the are of a circle, as at 14, and theflange 9 is correspondingly curved, so that the said edge and flangewill move in close relation and an accurate registration or movement ofthe edge of the flange with the shoulder ll will at all times result.

The loom 1 also has an auxiliary stop attachment to remove a greatportion of the strain from the members of the lock-hinge, the saidauxiliary attachment comprising a central collaror sleeve 15, which issecurely fastened on the loom immediately below and close to the lockmembers and having radial arms 16, which extend over the real-portionsor faces of the blades 2 and across the plane of the slot 7 when theblades are open and terminally bear upon portions of the blades beyondthe outer terminal Walls of the said slots 7.

In the operation of the improved device the blades regularly open andclose without the least obstruction and will be exceptionally efficientin propelling a boat either by manual operation or in connection with amotor. The auxiliary stop attachment also prevents the blades fromswinging around on the loom and insures their'proper presentation at alltimes to obtain a maximum impact operation in relation to the Water.

Having thus fully described the invention, what is claimed as new is- Apropeller, comprising a loom having blades movably attached thereto neartheir outer ends, a lock-hinge consisting of two members secured to thecenter of the blades and both having the loom extending therethrongh,the edge of one member being formed partly in the arc of a circle andhaving a shoulder on one side, and a recess on its opposite side, andthe other member having an upwardly-curved flange to coact with saidshoulder to regulate the opening movements of the blades, the shank ofthe flanged member coacting with the recess in the other member by meansof which the blades are always held partially open, and an auxiliarystop comprising a sleeve secured to the loom and approximately near thelock-hinge, said sleeve being provided with oppositely-extending armswhich are adapted to bear against said blades, substantially asspecitied.

In testimony whereof I aflix my signature in presence of two witnesses.

WILLIAM B. TERRY.

Witnesses:

GEO. F. PUTLY, WM. G. MCNESS.

